package pattern.factory;

public class ShapeFactory {

    // 使用 getShape 方法获取形状类型的对象
    public Shape getShape(String shapeType)
    {
        if (shapeType == null)
        {
            return null;
        }
        if (shapeType.equalsIgnoreCase("CIRCLE"))
        {
            return new Circle();
        }
        else if (shapeType.equalsIgnoreCase("RECTANGLE"))
        {
            return new Rectangle();
        }
        else if (shapeType.equalsIgnoreCase("SQUARE"))
        {
            return new Square();
        }
       return null;
    }

}
